This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A131414 #2 Mar 30 2012 17:25:22 %S A131414 1,5,1,10,3,1,16,5,3,1,23,7,5,3,1,31,9,7,5,3,1,40,11,9,7,5,3,1,50,13, %T A131414 11,9,7,5,3,1,61,15,13,11,9,7,5,3,1,73,17,15,13,11,9,7,5,3,1 %N A131414 A130302 + A130303 - A000012. %C A131414 Left column = A052905: (1, 5, 10, 16, 23, 31,...). Row sums = A095794: (1, 6, 14, 25, 39,...). %F A131414 A130302 + A130303 - A000012 as infinite lower triangular matrices. %e A131414 First few rows of the triangle are: %e A131414 1; %e A131414 5, 1; %e A131414 10, 3, 1; %e A131414 16, 5, 3, 1; %e A131414 23, 7, 5, 3, 1; %e A131414 31, 9, 7, 5, 3, 1; %e A131414 ... %Y A131414 Cf. A130302, A130303, A052905, A095794. %K A131414 nonn,tabl %O A131414 1,2 %A A131414 _Gary W. Adamson_, Jul 08 2007